[OS X TeX] parametricplot in pstricks

Nitecki, Zbigniew H. Zbigniew.Nitecki at tufts.edu
Mon Sep 10 20:13:00 CEST 2018


My apologies.  You are right—I thought I was getting the line using either one, but when I replaced cos (degrees) with COS(radians), the line curved.
MY BAD!

Z

Zbigniew Nitecki
Department of Mathematics
Tufts University
Medford, MA 02155

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On Sep 10, 2018, at 12:16 PM, Michael Sharpe <msharpe at ucsd.edu<mailto:msharpe at ucsd.edu>> wrote:



On Sep 10, 2018, at 8:27 AM, Nitecki, Zbigniew H. <Zbigniew.Nitecki at tufts.edu<mailto:Zbigniew.Nitecki at tufts.edu>> wrote:

What is wrong here?  using pstricks, pst-plot and \pst-math, the following command
\parametricplot[plotstyle=curve, plotpoints=50]{-1.8}{1.8}{0.25 t Pi mul mul cos t}
which should create a curve opening left, creates a vertical line.

Minimal example:



Remember that cos in Postscript expects its argument in degrees, so you may wish to use instead

\parametricplot[plotstyle=curve, plotpoints=50]{-1.8}{1.8}{0.25 t 180 mul mul cos t}

Michael

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